Consider the following information: Boredom and sameness have contributed to a stabilization in purchase of commercial gym memberships. Suppose the amount Americans spent on gym memberships annually from 2001 to 2015 can be modeled by the function

f(x) =24.2+3.35ln(x) 1x15

wherexrepresents the number of years since 2000 and

f(x)

represents the amount spent on commercial gym memberships, measured in billions of dollars.According to the model, how much did Americans spend on gym memberships in 2005 (in billions of dollars)? Round to three decimal places. billion dollars